To find out how much money Saul will earn for taking care of the pets over 10 long weekends, you can multiply the amount he earns each time by the number of weekends he works.
Here's the calculation:
\[ 25.75 , \text{(earnings per weekend)} \times 10 , \text{(number of weekends)} = 257.50 \]
So, Saul will earn $257.50 this year.
The correct answer is $257.50.